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A Study on Progressive Collapse Behavior of Steel Structures Subjected to Fire Loads

机译:钢结构在火灾荷载下的渐进倒塌行为研究

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Progressive collapse is one of the main reasons for the failure of structure. It occurs due to removal/ damage of a column or a shear wall by fire, blast or vehicle impact. In this study, aG+7 moment resisting steel frame residential building was analysed using ETABS to predict the sensitivity of the structure to progressive collapse due to fire loads. Columns at different levels were given a temperature of 550? C with reduced material properties and yield strength as per code IS 800. Progressive collapse load combination was adoptedas per GSA guidelines. Corner, edge, intermediate and re-entrant columns were removed separately at alternate storeys. The lower storeys were found to be more susceptible than the upper storeys. The structure may be redesigned to avoid progressive collapse, with a significant increase in steel consumption. This study can be useful for important structures..
机译:渐进式倒塌是结构破坏的主要原因之一。它是由于火灾,爆炸或车辆撞击而拆除/损坏立柱或剪力墙而发生的。在这项研究中,使用ETABS对aG + 7抗弯矩钢结构住宅楼进行了分析,以预测结构对火灾荷载引起的渐进倒塌的敏感性。不同水平的色谱柱温度为550? C符合IS 800,具有降低的材料性能和屈服强度。按照GSA准则采用了渐进式破坏荷载组合。拐角,边缘,中间和凹入的柱子在备用楼层分别被移走。发现下层比上层更容易受到伤害。可以重新设计结构,以避免逐渐倒塌,从而显着增加钢材消耗。这项研究对于重要结构可能有用。

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